(i) Let A = {2, 3, 4, 5} and B = {3, 6}
∴ A ∩ B = {3} ∴ A ∩ B ≠ φ
∴Given sets are disjoint sets.
(ii) Let A = {a, e, i, o, u} and B = {a, b, c, d}
A∩B = {a}.
Given sets are disjoint sets.
(iii) Given sets are A = {2, 6, 10, 14} and B = {3, 7, 11, 15}.
∴ A ∩ B =φ
(iv) Given sets are disjoint sets.
Let A = {2, 6, 10} and B = {3, 7, 11}
∴ A ∩ B = φ
∴ Given sets are disjoint sets.